Three-off EVM cards fitted with homebrew 125MHz VCOs and 5MHz LVCMOS references, programmed from AFE722x Software Control (V1.3) all show the same performance: apparent correct adoption of desired parameters (e.g. divider settings, levels), but with no indications of phase detector activity.
The tuning rails appear open circuit, but respond to half-rail setting. In test mode, activation of current sink or source gives the correct outputs, but in normal mode switching from positive to negative current output direction does not cause the normally low CP to go high.
One further observation: The GUI "Read all" button appears to do nothing, failing to get default settings when a unit is powered afreash (including a "refresh USB" command).
Chris Ward